Arch Linux

mc33

Member

From: Plano, TX

Registered: 2013-07-12

Posts: 12

[Solved] Cannot ping my Arch linux pc from other devices

My newly installed arch linux pc is connected to my home network via wifi. I can successfully connect to the Internet. Also, I can successfully ping other devices on my network. However, I am unable to connect to my Arch linux pc from any other device on the network. As I said, I cannot even ping it from these other devices.

Does anyone have an idea as to what would cause this?

Last edited by mc33 (2015-05-12 20:29:06)

ewaller

Administrator

From: Pasadena, CA

Registered: 2009-07-13

Posts: 20,353

Re: [Solved] Cannot ping my Arch linux pc from other devices

Are you using dynamic or static addresses on your Arch box?
Are you trying to ping by hostname or by quad-dotted notation (example: 192.168.0.100)?
What kind of router are you using?
Are you sure you are on the wireless network you think you are ?

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mc33

Member

From: Plano, TX

Registered: 2013-07-12

Posts: 12

Re: [Solved] Cannot ping my Arch linux pc from other devices

My Arch pc is assigned a static IP.  I am trying to ping with quad-dotted notation. The wireless router is an Asus RT-N66U. Yes, I am on the proper wireless network - -  I double checked that.

ewaller

Administrator

From: Pasadena, CA

Registered: 2009-07-13

Posts: 20,353

Re: [Solved] Cannot ping my Arch linux pc from other devices

I have a hunch that the router does not know how to find your machine.  Routers need to know to find which each IP address that is attached.  Yours might not be smart enough to remember that an address that it did not assign talked to it over the wireless.  When other computers try to talk to your address, it is clueless that you are on the wireless segment of the network, cannot find it on any wired ports, and (if it is not smart enough to figure out that it is not routable) will send it up stream or (if it is smart) will drop the packet.   Try DHCP, or, ensure that the router itself knows that the static address has been assigned to your MAC.  To do that, you will need to go into the router setup.

Last edited by ewaller (2015-05-06 05:33:31)

---

Nothing is too wonderful to be true, if it be consistent with the laws of nature -- Michael Faraday
Sometimes it is the people no one can imagine anything of who do the things no one can imagine. -- Alan Turing
---
How to Ask Questions the Smart Way

mc33

Member

From: Plano, TX

Registered: 2013-07-12

Posts: 12

Re: [Solved] Cannot ping my Arch linux pc from other devices

Thanks. I will switch to dhcp and see how it goes.

yanthor

Member

Registered: 2015-03-22

Posts: 14

Re: [Solved] Cannot ping my Arch linux pc from other devices

@mc33 do you have problems pinging other wireless devices?
Many routers have "Wireless Isolation" or "AP Isolation" modes, where wireless clients can't communicating with each other.

Do you have some firewall on the Arch box?

mc33

Member

From: Plano, TX

Registered: 2013-07-12

Posts: 12

Re: [Solved] Cannot ping my Arch linux pc from other devices

No, I do not have a firewall running on my Arch box. And I am able to ping other wireless devices.

However, after switching from a static IP to DHCP, the problem has gone away.

Thanks for the assistance.

mc33

Member

From: Plano, TX

Registered: 2013-07-12

Posts: 12

Re: [Solved] Cannot ping my Arch linux pc from other devices

I have a hunch that the router does not know how to find your machine.  Routers need to know to find which each IP address that is attached.  Yours might not be smart enough to remember that an address that it did not assign talked to it over the wireless.  When other computers try to talk to your address, it is clueless that you are on the wireless segment of the network, cannot find it on any wired ports, and (if it is not smart enough to figure out that it is not routable) will send it up stream or (if it is smart) will drop the packet.   Try DHCP, or, ensure that the router itself knows that the static address has been assigned to your MAC.  To do that, you will need to go into the router setup.

I switched my Arch box to Dhcp. I thought the problem had resolved, but the issue has come back even with Dhcp enabled. I have isolated the problem to the wireless router. If I refresh Dhcp on the router, I can then ping my Arch box from other devices again. Is there anything I can do to the router to resolve this? Again, the wireless router is an Asus RT-N66U.

nomeed

Member

Registered: 2015-05-08

Posts: 13

Re: [Solved] Cannot ping my Arch linux pc from other devices

What message does ping return?

also try

$ ip neigh flush all 

on one of your linux hosts to flush your arp cache
and ping afterwards

If I refresh Dhcp on the router, I can then ping my Arch box from other devices again. Is there anything I can do to the router to resolve this? Again, the wireless router is an Asus RT-N66U.

try a factory reset, did you try a different router? Otherwise theres not a lot you can check on a consumer router

mc33

Member

From: Plano, TX

Registered: 2013-07-12

Posts: 12

Re: [Solved] Cannot ping my Arch linux pc from other devices

I tried factory-resetting the router, which did not help. I had an access point laying around. After connecting my Arch box to the AP, the issue has resolved.